Many smartphone or tablet owners have done it, whether we have kids of our own or not: handed our devices over to a youngster that we’re tasked with entertaining. Now Android users can lock kids and other guests out of accessing their real wallets with in-game currency purchases.

The trouble is that children (or, heck, adults) who don’t understand the difference between in-game currency and real-world cash, leading to infamous stories in the annals of consumer reporting like the 8-year-old who spent more than a thousand bucks on Smurfberries.

Fortunately, Google is here to save us all. Over the weekend, a new version of the Google Play Store app came out that provides a fix for this problem by providing an option to require your password for every in-app purchase. It’s probably a good idea to update the app and turn the option on right now, before you even think about pulling up Angry Birds and handing the phone to your niece.